Automatic weighing-scale.



I A. GAUVIN. AUTOMATIC WEIGHING SCALE.

- APPLICATION PILEI 815F115, 1910.

1,029,602, Patented June18, 1912.

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which the followin act description.

This invention relates to improvements in.

elevation also AvILA eAUvIN,

9F MONTREAL, QUEBEC, CANADA.

AUTOMATIC WEIGHING-SCALE.

To all whom it may concern:

Be it known that I, AVILA Gs UVIN, of the city of Montreal, in the vince of Quebec and Dominion of Canada, have invented certain new and useful improvements in Automatic eighing-Scales, of,

g is a full, clear, and exa'utomati'c weighing scales, and'the main-object is to provide means whereby the scale will come quickly to a balance without the necessity of shifting the counterpoise.

A further object is to' provide a weight indicating mechanism for the scale which cannot be tampered with.

To accomplish these objects I provide a framework carrying a suitably arranged depressible platform connected to a pivoted beam, which is in turn connected to a weighted pendulum lever, a "curved glass tube having a bubble passing under a suitably graduated scale placed on the platform.

In the drawings which illustrate my inventionz Figure 1 is a front elevation of the device partly in section. Fig. 2 is a side partly in section. Fig. shows an alternative form. of connection between the scale beam and the pendulum lever. Fig. 4 shows .a further alternative form of connection.

In the above defined figures, 5 designates a suitably shaped base, and 6 the inclosing case of the weighing mechanism, which is supported above the base by a pair of hollow legs 7. A yoke '8 isfiXed to the front end of the base and pivotally supports the platform lever 9 by means of the bearings ,10. This lever may be of any suitable shape and is provided at thefront with a hollow portion ll which may be loaded when assembling the scale.

The lever 9 is provided with a tall 12 having an arm 13 extending at an angle thereto, and entering one of the legs 7 through a slot" 14 therein. The platform support 15 is pivotally mounted on the lever,

9 by means of the bearing 16' located at each side thereof and to. the rear of the bearings 10. This platform support 1s main Y tained in a horizontal position by means a central post 17 depending therefrom and passing through an aperturelii'inthe base, 5. The lower end of thepost s pivotal to one end of I a; 19, theta 1 9$? Specification of Letters Patent. Application filed September indicates the weight Patented June 18, 1912. 1910. Serial No. 582,208.

which is pivoted to the base. 15 may be flat, as shown, and adapted to support the plat-form 20, or may be curved to support a scoop-pan, such as is used by grocers. The framework, consisting of two similar supports 21, is located diametrically across the case 6, and is raised at its center 22, where the beam 23 is supported by ballbearings 24. The lever "is pivoted in ball-bearings immediately below the ballbearings 24:, and depends to within a short distance of the bottom of the case 6. The lower extremity of the lever 25 is provided with a bob or weight 27, similar in shape to the bob of a clocl: pendulum. This weight 27 forms the counterpoise of the scale and is adapted to be swung like a pendulum when the weight is placed on the scale platform. Immediately above the weight 27, a s'm'lll weight 28 is slidably mounted -on a lever 25 and is provided with a setscrew 29 to hold it at any desired point on the lever. At the ends of the beam 23 are caps 30 and This support curved scale 33 located above the tube. The

tube 32 contains a suitable liquid in; which a small bubble 3a is left, such as is used in a spirit level, and this bubble moving in the vtube .32 as the scale beam tilts, indicates on the scale 33 the weight of the articleplaced on the platform, connected to the scale beam, while the cap 31 is mounted on the the beam.- One arm of thebeam 231's provided witha short depending finger 3G, to

which the upper endof a rod- 37 is pivot-ally weight 4-3 being the lbwest point. The ip- ,posite end of this needle is adaptedto sr. 1g

opposite side 'of the level 25 The cap 30 is pivotally beam by means of set screws 35, sothat the tube maybe readily adjusted to over the scale 44 formed on theweight 27;

e lever 25 and'weight 26 move to protectlthe mechanismwithin are plates 45 for the casing the case 6, I provide front and back cover which are preierably made of thick g1 ss. A suitable fender 46 may be attached t the platform to protect the glass coverfrom breakage or soilmg. 7

In the alternative form shown in Fig. 3, the finger 39 ofthe beam is omitted, and the connecting link a0 is made L-shaped, the lug 41 of the lever 25 is lengthened and shifted to the side of the lever adjacent the link. In Fig. 4 the L-shaped link is replaced by a straight link and the finger 36 of the beam eliminated.

Any suitable cash computing and weight indicating device 47 may be mounted above the case 6 and operated ,b-y means of a rod L8,'which passes down partlythrough guard tubes 49 and partly through the case 6, and is attached at its lower extremity to the arm 13 of the platform lever 9.

The operation of the device is simple, and it will be easily understood that articles placed on the platform 20 depress the same so that the lever 9 is also depressed to tilt' the beam 23 through the medium of the rod 37. As the beam tilts, it moves the lever 25 r to one side, thereby raising the weight 27. The finger 39 of the beam,'allows the pull on the lever 25 to be in a substantially horizontal direction, the farther the lever 25 is swung to'one side, the farther it raises the 7 weight, and the farther the weight moves laterally, the greater the leverage it exerts, as will be readily seen-from Fig. 1 of the drawings. As the scale beam tilts, the bub ble 34 seeking the highest point of the curved tube 32 indicates on the scale 33 the weight on the platform.

Having thus described my invention, what I claim is 1. In a weighing scale, a scale beam, a platform, means connecting the scale beam and platform, a counterpoise, a lever suspending the counterpoise below the scale beam, an arm on said lever, .a link connecting the extremity of said arm with'the scale beam, and, a small adjusting weight slidably mounted on the lever between the counterpoise and the lever arm.

2. In a weighing scale, a scale beam, a platform, means connecting the scale beam and platform, a circular counterpoise having a scale formed thereon, a needle pivoted on the counterpoise having one end thereof weighted and the opposite end thereof adapted to indicate weights on said scale, a lever suspending the counterpoise below the scale beam, an arm onsaid lever, a link connecting the extremity of said arm with the scale beam, and a'small adjusting weight slidably mounted on the lever between the counterpoise and the lever arm.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

AVILA GAU'VIN.

Witnesses:

STUARTYR. W. ALLEN, 11R. MCKENZIE. 

